Geodesic
The atomic theory of multiplication and division of semiring ideals
Fundamentalʹnaâ i prikladnaâ matematika, Tome 15 (2009) no. 2, pp. 169-189

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We consider two-sided ideals of semirings. More precisely, we study the theory of two-sided ideals in the signature consisting of the predicate symbol $\subseteq$ and three function symbols that denote the multiplication, right division, and left division of ideals. We prove that the set of those atomic formulas in this signature that are valid for all semirings and all valuations is decidable. 
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     author = {A. E. Pentus and M. R. Pentus},
     title = {The atomic theory of multiplication and division of semiring ideals},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {169--189},
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     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2009_15_2_a7/}
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A. E. Pentus; M. R. Pentus. The atomic theory of multiplication and division of semiring ideals. Fundamentalʹnaâ i prikladnaâ matematika, Tome 15 (2009) no. 2, pp. 169-189. http://geodesic.mathdoc.fr/item/FPM_2009_15_2_a7/